dr.ir. P.C.J. Hoogenboom
October 2024
1) In our mind we replace the concrete and reinforcement of a deep beam by a linear elastic material. The engineer enters the shape, supports and load into a finite element program, for example SCIA Engineer. The software computes the stresses (handout 1, p 1). The computer shows the principal directions in each finite element (handout 2). The engineer draws the stress trajectories.
2) The engineer uses the trajectories to design a strut-and-tie model (vakwerkanalogie, handout 3). Software, for example Matrix Frame, computes the forces in the strut-and-tie model. The engineer chooses reinforcement to carry the tensile forces. The connections (nodes) between struts and ties are designed with hooks and stirrups to prevent local failure (handout 4).
1) As above.
2) The software (SCIA Engineer) computes the required reinforcement in every finite element of the deep beam (Theory: handout 1, p 6. Code: handout 5. Practice: handout 6, last page). The engineer adds development length (verankeringslengte) and designs a reinforcing cage that can be built (handout 1, p 18).
3) Optional. The engineer enters the reinforcing bars into the software. The software checks stresses and crack widths.
October 8, 15:45 - 17:30 hours, room 1.98, Theory.
October 11, 15:45 - 17:30 hours, room 3.98, Practical, Install SCIA Engineer in advance (Google "SCIA" and "campus"). In the lecture we will follow the instructions in handout 6.
The teacher will formulate a few questions on deep beams. The questions will be part of the CT3260 exam.